Big centralized exchanges that only offer crypto to crypto will eventually die. There just isn't a need to trust anyone in crypto and people will come to realize that very soon with all the DEXs coming out. One of them will do it right, advertise enough to get people in, generate hype and good to go.

We'll need the fiat to crypto exchanges because it's a way for new people to get in and is highly regulated, and we'll need DEXs. Polo, binance, bittrex, they'll either need to become decentralized, which I think binance said 3y where going to, or they'll just get rekt.